Question

我有以下设置，根本没有通知。

基于堆栈上的其他类似问题，我为每个请求添加了一个唯一的标识符，并且我还将内容添加到内容中。

我有这个请求用户许可的功能。

    func sendIntNotifications()
        {
            //1.  Request permission from the user
            UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .badge, .sound], completionHandler:
                {
                    (granted, error) in

                    if granted
                    {
                        print ("Notification access granted")
                    }
                    else
                    {
                        print(error?.localizedDescription)
                    }

                    UNUserNotificationCenter.current().delegate = self
                })
// This function has a lot of other code that then calls this function to set multiple notifications :


            for daysInt in outputWeekdays
            {
                scheduleActualNotification(hourInt: hourInt, minuteInt: minuteInt, dayInt: daysInt)
            }
        }

这些是主要功能：

func scheduleActualNotification(hourInt hour: Int, minuteInt minute: Int, dayInt day: Int)
    {
        // 3.1 create date components for each day
        var dateComponents = DateComponents()

        dateComponents.hour = hour
        dateComponents.minute = minute
        dateComponents.day = day

        //3.2 Create a calendar trigger for that day at that time
        let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponents,
                                                    repeats: true)

        //3.3 Message content
        let content = UNMutableNotificationContent()
        content.title = "Test Title"
        content.body = "Test body"
        content.badge = 1

        // 3.4 Create the actual notification
        let request = UNNotificationRequest(identifier: "bob \(i+1)",
                                            content: content,
                                            trigger: trigger)
        // 3.5 Add our notification to the notification center
        UNUserNotificationCenter.current().add(request)
        {
            (error) in
            if let error = error
            {
                print("Uh oh! We had an error: \(error)")
            }
        }

    }

此功能用于在此应用程序打开时收到通知

func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void)
{
    completionHandler([.alert, .sound]) //calls the completionHandler indicating that both the alert and the sound is to be presented to the user
}

没有错误lol！

修改：

因此，从用户界面，我选择了2350以及周六和周日。我希望通知会在周六和周日的2350发送。

我做了print(daysInt)。它的第一个值是1，它的第二个值是7，正如预期的那样。其次，我进入函数scheduleActualNotification，小时值为23，分钟值为50，正如预期的那样。

谢谢！

Answer 1

因此，经过数周的挫折，这就是解决方案：

将dateComponents.day = day替换为dateComponents.weekday = day。 .day表示一个月中的某一天，而.weekday是一周中的某一天！

也不要使用dateComponents.year = 2017，因为这会导致通知不被触发。

现在通知工作完全正常!!

Answer 2

Calendar Unit Flags可以帮助您：

var notificationTriggerCalendar : UNCalendarNotificationTrigger? = nil

if let fireDate = trigger.remindAt {

  let unitFlags = Set<Calendar.Component>([.hour, .year, .minute, .day, .month, .second])
  var calendar = Calendar.current
  calendar.timeZone = .current
  let components = calendar.dateComponents(unitFlags, from: fireDate)
  let newDate = Calendar.current.date(from: components)

  notificationTriggerCalendar = UNCalendarNotificationTrigger.init(dateMatching: components, repeats: true)
}

Swift 3本地通知未触发

2 个答案: